Support made of plastic or cementitious material.



,821. PATENTES AUG. 2o, 1907.

G. P. Woon. SUPPORT MAM 0F PLASTIC 0R GEMBNTITIOUS IVIATERIAL.`

APPLICATION FILED MAY 2. 1905.

P f l l l @mow www.

GEORGE P. WOOD, OF WASHINGTON,`DISTRICT OF COLUMBIA.

SUPPORT MADE PLASTIC OR CEMENTITIOUS MATERIAL.

Specification of. Letters Patent.

Patented Aug. 20, 1907.

Application filed May 2,1905. Serial No. 258,496.

To all whom it 'may concern:

Be it known that I, GEORGE P. Woon, a citizen of the United States,residing at Washington, District of Columbia, have invented new anduseful Improvements in Supports Made of Plasticor Cementitious Material,of which the following is a specification.

This invention relates to a new and useful improvement in supports madeof plastic or cementitious material, such as concrete wherein thesupport is made more efficient for resisting pressure by means of rodsor other metal reinforcement embedded therein.

The object of the present invention is to produce a support which shallmaintain a constant resilient resistance to any pressure or forceapplied thereto preventing deflection dr breaking of the material.

The invention consists in the construction herein-- alter pointed out.

The drawings illustrate and the specification describes a variety ofstructures all displaying the invention in varied forms and With variedapplication.

In these drawings: Sheet I. Figure l represents a plan view of a fiooror similar construction containing the invention. Fig. 2, a verticalsection on line 2 2, Fig. l. Fig. 3, a vertical section on line 3 3,Fig. l.. Fig. 4, a vertical section on line 4 4, Fig. l. Fig. 5, aninverted isometrical projection of the oor, Fig. l.

In these drawings The letter A indicates a support shown on Sheet I as afloor. This floor or support consists of the main flat portion, a, andthe projections or ribs, a a?, arranged substantially at iight angles asshown.y These ribs have the middle) or main portions, a a, substantiallysymmetrical or rectangular in cross section. The ends, a5 a, divergelaterally, having the flaring extremities, a7 as, and diminishing inthickness, running out at an al", before reaching the edge, there beinga rim, a, all around the support beyond the ends of the projections orribs. One set of ribs, as a2, may be of less depth than theother set, a.The support or floor, a, and the ribs, a1 a2, are made in one piece orhomogeneous, being made of concrete molded in any known way: The 4rim oredges, a, of this support or fioor is to rest upon suitable bearings orwalls, B, this being generally a distinguishing feature of the presentinvention.

As the homogeneous support and projections are formed there aregenerally placed in the mold suitable rods, platesA or other forms ofmetal reinforcement. Reinforcement, such, for example, as the one C, is

placed in the mold for each projection or rib, a1 a2, the

metal being bent up, as at C, so as to conform to the configuration ofthe projections or ribs the ends of the reinforcements extending intothe rim or edges a. The sets of reinforcement, C Cfcross each other asindicated in Fig. 3. The main portion, a, of the floor is shown providedwith rods, a3. The use of metal reinforcement in the main portion, a,does not necessarily differ from usual construction, and same may notcontain metalreinforcement, but for economy it will be found generallydesirable to have this metal reinforcement used in two directions or atright angles to each set o parallel ribs in this instance.

After the concrete is molded and set about the met-al reinforcementthere is produced the supporter' floor shown in Sheet I of the drawings.This consists of the homogeneous main portion, a, and projections orribs, a a2, the latter containing within them the metal reinforcement.If desired, this support maybe used inverted for the support of Walls,etc., at theedges, the

projections or ribs being on top, admitting of use to support columnsfor carrying a superstructure where the earth is soft and unstable.

The invention described produces a construction wherein the main supportis resiliently braced by the projections or ribs so as to resistthrustor strain. The projections being homogeneous with the mainportions, any pressure is transferred from one part to another and isresisted not only by the concrete, but also by the embeddedreinforcement where the latter are used. The projections or ribs havinga trussed construction bear up against any strain thereon and the metalreinforcement acts as a tension member ofthe truss and take the thrustof the load with a resilient resistance. v

By the construction indicated the pressure or thrust is not takendirectly against the projections or ribs, but is first taken by thenia-in portion of the support. The strain is then transferred to theprojections or ribs-and is absorbed by them. As they do not bear againstthe Wall or bearing which carries the support, these projections or ribsare free to exert a resilient resistance to the thrust or load.

Having described my invention, what I `claim is:

1. A plastic support comprising a main support Aor slab and one or moreprojections or ribs homogeneous therewith, the projections or ribshaving arng and diminishing ends providing large areas of contactbetwe'enthe end portions of same and the main support 'and desired depthat middle of support with a small quantity and weight of material.

2. A plastic support comprising a main supp `xt m' slab and om nl'moi-ll projections oi' ribs lmmugmwong; therewith :ind having,y mvgali'eiufm-cvment vmlmhlml therein, the px'joctiomi lmv'im,r ilal'ing anddiminishing .ai is pro vidng lul-gv areas of cotut lwween thc mulyim'tloxis ui' samv und the main #import :1nd desirud dvptli ali middlewith zx ymall quantity and weight of material,

3. A resilivnt plastic support umnprising a main support or Aslab undhomogeneous thei'L-wth intersecting projections r ribs having flaringand di'ninishingr4 ends, the slab having u supporting rim beyond thesaid' ends of the pur jvutions or i'ilis. l

In testimony whereof I 'affix my signature, in presence of twosubseribing Witnesses.

` GEORGE I. WOOD. Witnesses:

Exairi P. LINCOLN, LOUIS MOLNAR.

